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Ever seen a blob of foam on a plant and wondered how it got there?
The frothy spittle, sometimes called cuckoo spit, is actually a telltale sign that an insect known as the spittlebug is feeding on a plant.
Scientists are calling for thousands of volunteers to help record sightings of spittle and spittlebugs across the UK.
The information will be used to map the distribution of the insect, in a pre-emptive strike against a deadly plant disease.
Xylella has struck several EU countries, blighting olive groves in southern Italy. The UK is clear of the disease but is on high alert.
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